fence
  The FenceParameters that will be evaluated. For example, a set of polygon features representing areas of interest. The FenceParameters can cover many features or graphics that will be checked.
There are three types of FenceParameters:
- A FeatureFenceParameters that is constructed from a FeatureTable. 
- A GraphicFenceParameters that is constructed from a list of Graphic objects. 
- A GraphicsOverlayFenceParameters that is constructed from a GraphicsOverlay. 
Since
200.1.0